condition mean min max 4 h after light 5.174113333333334 5.10821 5.294490000000001 8 h after light 5.13961 5.01622 5.358630000000001 12 h after light 5.20949 5.08605 5.40855 4 h after dark 5.199786666666666 5.03902 5.487509999999999 8 h after dark 5.293816666666666 5.05269 5.61137 12 h after dark 5.21532 5.01687 5.49638